Experimental evidence for the breakdown of a Hartree-Fock approach in a weakly interacting Bose gas
Quantum Physics
2016-08-16 v2 Statistical Mechanics
Abstract
We study the formation of a quasi-condensate in a nearly one dimensional, weakly interacting trapped atomic Bose gas. We show that a Hartree Fock (mean-field) approach fails to explain the presence of the quasi-condensate in the center of the cloud: the quasi-condensate appears through an interaction-driven cross-over and not a saturation of the excited states. Numerical calculations based on Bogoliubov theory give an estimate of the cross-over density in agreement with experimental results.
Keywords
Cite
@article{arxiv.quant-ph/0606247,
title = {Experimental evidence for the breakdown of a Hartree-Fock approach in a weakly interacting Bose gas},
author = {Jean-Baptiste Trebbia and Jérôme Estève and Christoph I. Westbrook and Isabelle Bouchoule},
journal= {arXiv preprint arXiv:quant-ph/0606247},
year = {2016}
}
Comments
submitted to Phys. Rev. Letters